42858-39-9Relevant articles and documents
ON THE REVERSIBILITY OF ALKENE CYCLOZIRCONATION
Taber, Douglass F.,Louey, James P.,Lim, Julie A.
, p. 2243 - 2246 (1993)
Diene 8, under cyclozirconation conditions, rapidly dimerizes to 10.This dimerization is reversible, slowly at room temperture and rapidly at 75 deg C.After equilibration, the dominant product is 12, the product of intramolecular cyclozirconation. Key words: carbocyclization, cyclometallation, cyclozirconation, diastereoselective, reversible, equilibrating
Synthesis and computational analysis of conformationally restricted [3.2.2]- and [3.2.1]-3-azabicyclic diamines
Tummalapalli, Sreedhar Reddy,Bhat, Rohit,Waitt, Craig,Eshuis, Henk,Rotella, David P.
, p. 4087 - 4089 (2017/10/06)
Conformational restriction is a useful approach for ligand design in organic and medicinal chemistry. This manuscript reports the facile synthesis and in silico conformational analysis of two new diastereomeric [3.2.2]-3-azabicyclic, two new [3.2.1]-3-aza-8-oxy-bicyclic and one new [3.2.1]-3-azabicyclic diamine scaffolds. A conformational analysis of these structures along with calculation of carbon–carbon/carbon–nitrogen bond angles was carried out and compared to those in the flexible 1,3-diaminopropane template upon which they were based. It is of particular importance that these scaffolds have bond lengths and angles that can overlap with low energy conformers of the flexible diamine. Such information is useful for ligand design in organic chemistry and for development of structure activity relationships and in silico screening in medicinal chemistry.
Catalysis by organic solids. Stereoselective Diels-Alder reactions promoted by microporous molecular crystals having an extensive hydrogen- bonded network
Endo, Ken,Koike, Takashi,Sawaki, Tomoya,Hayashida, Osamu,Masuda, Hideki,Aoyama, Yasuhiro
, p. 4117 - 4122 (2007/10/03)
Anthracenebisresorcinol derivative 1 as an organic network material shows a novel catalysis in the solid state for the acrolein-cyclohexadiene Diels-Alder reaction. The suggested mechanism involves a catalytic cycle composed of sorption of the reactants in the cavities of polycrystalline host 1, preorganized intracavity reaction, and desorption of the product. The host also promotes stereoselective intracavity reactions for alkyl acrylates and cyclohexadiene but, in this case, not in a catalytic manner. Relevance of the present system as a functional organic analog of zeolites is discussed in light of the kinetics of respective elementary processes and the effects of pulverization of the catalyst thereupon as well as X-ray crystal structures.